Robust visual speakingness detection using bi-level HMM. - Prasertsak Tiawongsombat; Mun-Ho Jeong; Joo-Seop Yun; Bum-Jae You; Sang-Rok Oh (Pattern Recognit., 2012)

Vision-Based Attentiveness Determination Using Scalable HMM Based on Relevance Theory. - Prasertsak Tiawongsombat; Mun-Ho Jeong; Alongkorn Pirayawaraporn; Joong-Jae Lee; Joo-Seop Yun (Sensors, 2019)